INFO: task kworker/u5:6:9225 blocked for more than 143 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u5:6 D27888 9225 2 0x80004000 Workqueue: knbd2-recv recv_work Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_timeout+0x5a7/0x9d0 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x3ff/0x560 kernel/sched/completion.c:115 wait_for_completion+0x18/0x20 kernel/sched/completion.c:136 flush_workqueue+0x35d/0x1350 kernel/workqueue.c:2826 drain_workqueue+0x148/0x3a0 kernel/workqueue.c:2939 destroy_workqueue+0x19/0x580 kernel/workqueue.c:4320 nbd_config_put+0x355/0x7b0 drivers/block/nbd.c:1163 recv_work+0xc0c/0xfa0 drivers/block/nbd.c:770 process_one_work+0x7d2/0x1560 kernel/workqueue.c:2269 worker_thread+0x85/0xb60 kernel/workqueue.c:2415 kthread+0x331/0x3f0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 INFO: task systemd-udevd:10845 blocked for more than 143 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D28024 10845 5365 0x00004100 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 nbd_open+0x84/0x5c0 drivers/block/nbd.c:1397 __blkdev_get+0x319/0x12e0 fs/block_dev.c:1612 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9db9559840 Code: Bad RIP value. RSP: 002b:00007ffdbf6d2a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055697b593fe0 RCX: 00007f9db9559840 RDX: 0000556979841fe3 RSI: 00000000000a0800 RDI: 000055697b5946a0 RBP: 00007ffdbf6d2bc0 R08: 0000556979841670 R09: 0000000000000010 R10: 0000556979841d0c R11: 0000000000000246 R12: 00007ffdbf6d2b10 R13: 000055697b593c40 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:10850 blocked for more than 144 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D28024 10850 5365 0x00000100 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 __blkdev_get+0x1a1/0x12e0 fs/block_dev.c:1596 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9db9559840 Code: Bad RIP value. RSP: 002b:00007ffdbf6d2a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055697b592960 RCX: 00007f9db9559840 RDX: 0000556979841fe3 RSI: 00000000000a0800 RDI: 000055697b593e60 RBP: 00007ffdbf6d2bc0 R08: 0000556979841670 R09: 0000000000000010 R10: 0000556979841d0c R11: 0000000000000246 R12: 00007ffdbf6d2b10 R13: 000055697b584fa0 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:10890 blocked for more than 144 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D28312 10890 5365 0x00000100 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 __blkdev_get+0x1a1/0x12e0 fs/block_dev.c:1596 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9db9559840 Code: Bad RIP value. RSP: 002b:00007ffdbf6d2a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055697b592960 RCX: 00007f9db9559840 RDX: 0000556979841fe3 RSI: 00000000000a0800 RDI: 000055697b593e80 RBP: 00007ffdbf6d2bc0 R08: 0000556979841670 R09: 0000000000000010 R10: 0000556979841d0c R11: 0000000000000246 R12: 00007ffdbf6d2b10 R13: 000055697b58e920 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:10937 blocked for more than 144 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D28024 10937 5365 0x00004100 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 nbd_open+0x84/0x5c0 drivers/block/nbd.c:1397 __blkdev_get+0x319/0x12e0 fs/block_dev.c:1612 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9db9559840 Code: Bad RIP value. RSP: 002b:00007ffdbf6d2a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055697b580180 RCX: 00007f9db9559840 RDX: 0000556979841fe3 RSI: 00000000000a0800 RDI: 000055697b5800c0 RBP: 00007ffdbf6d2bc0 R08: 0000556979841670 R09: 0000000000000010 R10: 0000556979841d0c R11: 0000000000000246 R12: 00007ffdbf6d2b10 R13: 000055697b584c30 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:10953 blocked for more than 144 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D28280 10953 5365 0x00000100 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 __blkdev_get+0x1a1/0x12e0 fs/block_dev.c:1596 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9db9559840 Code: Bad RIP value. RSP: 002b:00007ffdbf6d2a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055697b592960 RCX: 00007f9db9559840 RDX: 0000556979841fe3 RSI: 00000000000a0800 RDI: 000055697b580200 RBP: 00007ffdbf6d2bc0 R08: 0000556979841670 R09: 0000000000000010 R10: 0000556979841d0c R11: 0000000000000246 R12: 00007ffdbf6d2b10 R13: 000055697b590b10 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:11160 blocked for more than 145 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D27928 11160 5365 0x00000100 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 __blkdev_get+0x1a1/0x12e0 fs/block_dev.c:1596 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9db9559840 Code: Bad RIP value. RSP: 002b:00007ffdbf6d2a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055697b592960 RCX: 00007f9db9559840 RDX: 0000556979841fe3 RSI: 00000000000a0800 RDI: 000055697b590ee0 RBP: 00007ffdbf6d2bc0 R08: 0000556979841670 R09: 0000000000000010 R10: 0000002000000000 R11: 0000000000000246 R12: 00007ffdbf6d2b10 R13: 000055697b593d50 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.2:13905 blocked for more than 145 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28984 13905 9186 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 nbd_open+0x235/0x5c0 drivers/block/nbd.c:1410 __blkdev_get+0x319/0x12e0 fs/block_dev.c:1612 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4179b1 Code: 48 89 04 24 e8 50 2c ff ff 48 8b 6c 24 20 48 83 c4 28 c3 48 89 df 48 8b 44 24 48 e8 19 a4 04 00 48 89 f7 48 8b 44 24 50 e8 0c 04 00 4c 89 c7 48 8b 44 24 30 e8 ff a3 04 00 eb b6 48 8b 44 24 RSP: 002b:00007f88d4d90820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004179b1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f88d4d90850 RBP: 000000000118bf60 R08: 000000000000000f R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000293 R12: 000000000118bf2c R13: 00007fff50f20b2f R14: 00007f88d4d919c0 R15: 000000000118bf2c INFO: task syz-executor.2:13919 blocked for more than 145 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28984 13919 9186 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 __blkdev_get+0x1a1/0x12e0 fs/block_dev.c:1596 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4179b1 Code: 48 89 04 24 e8 50 2c ff ff 48 8b 6c 24 20 48 83 c4 28 c3 48 89 df 48 8b 44 24 48 e8 19 a4 04 00 48 89 f7 48 8b 44 24 50 e8 0c 04 00 4c 89 c7 48 8b 44 24 30 e8 ff a3 04 00 eb b6 48 8b 44 24 RSP: 002b:00007f88d4d6f820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004179b1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f88d4d6f850 RBP: 000000000118c008 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000118bfd4 R13: 00007fff50f20b2f R14: 00007f88d4d709c0 R15: 000000000118bfd4 INFO: task syz-executor.3:13909 blocked for more than 146 seconds. Not tainted 5.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28984 13909 9191 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x7b0/0x1850 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x420/0x1460 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 nbd_open+0x84/0x5c0 drivers/block/nbd.c:1397 __blkdev_get+0x319/0x12e0 fs/block_dev.c:1612 blkdev_get+0x18e/0x210 fs/block_dev.c:1750 blkdev_open+0x19f/0x200 fs/block_dev.c:1886 do_dentry_open+0x3f1/0x1010 fs/open.c:797 vfs_open+0x9a/0xc0 fs/open.c:906 do_last fs/namei.c:3416 [inline] path_openat+0x89e/0x29c0 fs/namei.c:3533 do_filp_open+0x177/0x250 fs/namei.c:3563 do_sys_open+0x1dd/0x3b0 fs/open.c:1089 __do_sys_open fs/open.c:1107 [inline] __se_sys_open fs/open.c:1102 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1102 do_syscall_64+0x96/0x440 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4179b1 Code: 48 89 04 24 e8 50 2c ff ff 48 8b 6c 24 20 48 83 c4 28 c3 48 89 df 48 8b 44 24 48 e8 19 a4 04 00 48 89 f7 48 8b 44 24 50 e8 0c 04 00 4c 89 c7 48 8b 44 24 30 e8 ff a3 04 00 eb b6 48 8b 44 24 RSP: 002b:00007fdaa44c8820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004179b1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fdaa44c8850 RBP: 000000000118bf60 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000118bf2c R13: 00007ffc23a8d81f R14: 00007fdaa44c99c0 R15: 000000000118bf2c INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 1581 Comm: khungtaskd Not tainted 5.3.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x86/0xca lib/dump_stack.c:113 nmi_cpu_backtrace.cold.0+0x49/0x86 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x195/0x1be lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x6a3/0xb60 kernel/hung_task.c:289 kthread+0x331/0x3f0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.3.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_purge_orig RIP: 0010:__kasan_check_write+0x0/0x20 mm/kasan/common.c:97 Code: ff ff 90 90 90 90 90 90 90 90 55 89 f6 31 d2 48 89 e5 48 8b 4d 08 e8 7f 25 00 00 5d c3 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 89 f6 ba 01 00 00 00 48 89 e5 48 8b 4d 08 e8 5c 25 00 00 5d c3 RSP: 0018:ffff8880b57dfb78 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88809d29de08 RCX: ffffffff814c9935 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff8880b57dfba8 RBP: ffff8880b57dfc10 R08: ffffed1013a53bc2 R09: ffffed1013a53bc2 R10: ffffed1013a53bc1 R11: ffff88809d29de0b R12: 1ffff11016afbf71 R13: ffff8880b57dfbe8 R14: ffff88809d29de18 R15: ffff88809d29de10 FS: 0000000000000000(0000) GS:ffff8880ba200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fefdddb9000 CR3: 00000000a4470000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x39/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] batadv_purge_orig_ref+0x175/0xf60 net/batman-adv/originator.c:1350 batadv_purge_orig+0x14/0x60 net/batman-adv/originator.c:1379 process_one_work+0x7d2/0x1560 kernel/workqueue.c:2269 worker_thread+0x85/0xb60 kernel/workqueue.c:2415 kthread+0x331/0x3f0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352